The European Tour have moved further to clamp down on slow play after making a key change to their initial four-point plan announced last year.

The new timing regulations come into force at this week’s Abu Dhabi HSBC Championship, where players will now be subject to a one-shot penalty if they are deemed to have taken too long twice during the tournament.

The original four-point plan stated that European Tour pros would be penalised a stroke for incurring two “bad times” in a single round, rather than over the full 72 holes.

A Tour statement confirmed that tournament referees now have “additional powers” to target slower players, starting at this week’s Rolex Series event at Abu Dhabi Golf Club.

Persistent offenders will also be handed increased fines if they are regularly put “on the clock” during the season, and the new regulations have been welcomed by the chief referee of the European Tour, John Paramor.

“The tougher measures which come into effect in Abu Dhabi empower our referees to more effectively target slower players,” said Paramor.